High school student Casey Becker receives a flirtatious phone call from an unknown person, asking her, "What's your favorite scary movie?" The situation quickly escalates as the caller tus sadistic and threatens her life. He reveals that her boyfriend Steve Orth is being held hostage. After Casey fails to answer a question correctly about horror films, Steve is murdered. When Casey refuses to cooperate with the caller, she is attacked and murdered by a masked killer.